Dynamo

Pronunciation: /ˈdaɪnəˌmoʊ/

Dynamo (noun)

  1. A small machine on a bicycle that makes electricity when the wheel turns.
  2. A device that changes mechanical energy into electrical energy using magnets and motion.
  3. A person with a lot of energy and drive, especially in work or activity.

Examples

  • The dynamo powers the bike lights when the wheel turns.
  • The bike lights work because the dynamo produces electricity.